Yarn-twisting machine



April 6, 1943 R. F. sTuEwER 2,315,5 62

YARN TWISTING MACHINE Filed Oct. l, 1941 xNvENToR4 I bObbin.

Patented Apr. 6, 1943 YARN-TWISTING MACHINE Reinhold F. Stuewer, Scranton, Pa., asslgnor to Grove Silk Company,

Sylvania A Y a corporation ofl Penn- "Application october 1,1941, serial No. 413,153

(ci. 57-35i 2 Claims.

This invention relates to the treatment of filaments and finds practical application in the sizing of nylon yarn. It is, however, of general applicability, particularly in the yarn industry, wherever a yarn is to be twisted and sized. It is general practice, in the throwing of nylon yarn, tol carry out the sizing as a separate and distinct step in the procedure; and for the purpose, special and costly machinery is required. Furthermore, in the now prevalent procedure, provision must be made whereby the sizing solution is circulated; and, as operation progresses, frequent adjustments of the size concentration must be made. The special machine alluded to includes as an essential element a roll that, partially submerged in a bath of size solution contained in a trough, revolves at the required speed; upon the size-covered surface of this roll the advancing yarn is caused to bear. My invention consists in adding to the twisting machine a simple element byl perspective of a cup of different specific form and character.

In the apparatus shown in Fig. I the sizing of yarn is carried out in conjunction with the twisting operation, and while the yarn Y is in progress from the twisting bobbin to the take-up The sizing and twisting operations are thus accomplished simultaneously.

While Various attachments such as the revolving roll ordinarily used would be satisfactory, I have found that immersion of the yarn in the sizing solution is to be preferred over other methods. Also it is desirable to dispense with the circulating system.

An arrangement that I have found most satisfactory is that shown in Fig. I. A plurality of small cups I, corresponding in number to the number of spindles comprised in the machine,

are set in vertical position upon the traverse bar 2. The cups are fed through tubing 3, and it will be understood that through suitable connections (rubber tubing, for example) the cups I may be supplied from a suitable stationary source.

The cups are conveniently made of glass; although metal, plastic, or ceramic materials may be used. Glass has the advantage of affording easy observation, which facilitates adjustment of the size level.

The yarn is immersed in the size within the cup by any suitable arrangement, conveniently by means of a small porcelain eye l attached to a spring wire 5 which is so formed that it may be removably inserted in the tube or cup by pressing the free ends together. Release of pressure on the spring allows it to seat firmly in the cup.

The level of the size within the cup is maintained at such height that the yarn passing through the porcelain eye within the cup is in its contirn'm c progress progressively immersed in the size solution. 'I'he yarn passes directly from the cup to the take-up bobbin without making any further contact.

In Fig. I it diagrammatically appears that the yarn drawn from a spinning bobbin Ii to a takeup bobbin l, and by the intervention of the traverse bar 2 laid in ordered wrap upon the take-up bobbin, is, by the provision of the cup of my invention, sized as it advances.

In place of a cup such as that show-n in Figs. I and II, the cup element shown in Fig. III may be employed. This element and the method involved in its use are the subject of a co-pending application for Letters Patent, filed October l. 1941, Serial No. 413.152. In this case a member that includes two opposite surfaces spaced apart at a narrow interval (the furcations 8 and 9 of a medially bent strip of steel) is placed vertically in a pool of sizing liquid maintained Within the cup II and rises from beneath the surface to a higher level; the liquid, under capillary attraction, rises between the furcations 8 and 9 above the general surface of liquid Within the cup in a column I. This column is exposed on two sides, affording access to it; and the yarn Y, advancing through the spacel between the furcations 8, 9, meets the liquid of the column I, and, taking it up, is sized. Capillary attraction is effective to maintain the column I as the advancing yarn continuously carries the liquid away.

The element of Fig. III has the following advantages over that of Figs. I and II: (1) The tension upon the yarn may be greatly reduced; twist-setting is easier and a. softer bobbin may be wound. (2) The porcelain eye (or other means of keeping the yarn immersed) is eliminated, which is desirable because of the need of frequent replacement caused by wear. (3)

No guide or other machine part need be interposed, to be engaged by the thread in its course from the applicator 8, 9, and thereforeaccumulation of size on machine parts is eliminated.

The capillary element of Fig. III will be mounted upon the traverse bar 2 and will move with the bar; and the unit will act as a guide, to carry the yarn from side to side on the takeup bobbin 1. The yarn will be guided in its approach to the cups by means o1' a Wire or rod attached to the traverse bar 2 in front of the cups and by the bobbin itself.

The level of the size within the cup Il of Fig. III may be maintained by means of a constant level Siphon, of known structure and effect. By such means circulation of the size is rendered unnecessary and there is no need for frequent adjustment of concentration.

The quantity of size applied to the yarn depends upon the concentration and viscosity of the sizing solution and upon the speed with which the yarn travels and its diameter.

While the invention is particularly Welladapted to apparatus for the sizing of Nylon yarns, it is of general applicability in the appliasiatica cation of oils or other textile assistants to yarn in course of twisting.

I claim as my invention:

1. In yarn-treating apparatus the combination of yarn-sizing means with yarn-twisting means, the yam-twisting means including a spinning bobbin, a take-up bobbin, and a traverse bar arranged between the spinning bobbin and the take-up bobbin, and the sizing means consisting of a cup for sizing liquid equipped with a yarn guide and borne by the traverse bar.

2. In yarn-treating apparatus the combination of yam-sizing means with yarn-twisting means, the yarn-twisting means including a spinning bobbin, a take-up bobbin, and a traverse bar arranged between the spinning bobbin and the take-up bobbin, and the sizing means consisting of a cup for sizing liquid borne by the traverse bar together with means for maintaining a capillary column of liquid rising above the general surface of a pool of sizing liquid within the cup, such last-named means constituting also a guide for the advancing yarn.

REINHOLD F. STUEWER. 

